White House Staff Secretary Rob Porter watches as President Donald Trump speaks during a meeting with North Korean defectors in the Oval Office on February 2. The US Congress has opened an investigation into the handling by the White House of Porter. Photo: The Washington Post

White House Staff Secretary Rob Porter watches as President Donald Trump speaks during a meeting with North Korean defectors in the Oval Office on February 2. The US Congress has opened an investigation into the handling by the White House of Porter. Photo: The Washington Post